At this point I've pretty much given up on this topic (tier lists are so boring/uninformative), but as a parting thought I wanted to chime in on Ike and Shulk, as I've played both characters in tournament: Ike is better. Certainly with customs on, probably with customs off.
The difference is commitment. Shulk has to commit to an approach whereas Ike is mostly safe with his aerials and tilts, which makes all the difference. Shulk isn't that good in neutral (he's not bad, he's just average), especially because he has basically no autocancels (f-air autocancels in an incredibly awkward window), whereas Ike is probably one of the best characters in neutral. B-air alone (completely safe on shield, super fast, kills early) is reason for Ike to be well above Shulk, but Shulk's arts don't make up for Ike's general safety: look at Ike's d-tilt, f-tilt, and f-air. Shulk's tilts are all punishable (even on shield) outside of Buster Mode, but Ike is always completely safe if he spaces well.
Ike also does more damage since he has more combos (independent of art; Ike can do 15-25% if he hits you once), and Shulk's aerials do meh damage overall.
Also, Ike's recovery is better outside of Shulk's Jump Mode.
Shulk is better at edgeguarding (with customs off), because of Jump Monado. He's also slightly better against projectiles while in Speed. But Ike's advantages are much bigger.
With customs on... well, I'm pretty sure that Ike is the best character in the game with customs on, better than Sonic/Palutena/etc, but that's a thought for another time.